Which of the following is not an example of a property of an object? a. gasoline is flammable. b. a textbook is heavy. c. a flower is pretty. d. a car is red.

C) A flower is pretty.

All the other choices are facts about the object, but saying a flower is "pretty" is an opinion.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.